Weight Loss & Weight Gain

Rob Kardashian's breakin' a sweat ... and it's more than just alright.

Rob joined big sisters Kourtney and Khloe for a CrossFit-style workout -- with some RiRi in the background for inspiration. Rob was working the middle hard ... courtesy of a medicine ball and some TRX bands.

Model Rosie Mercado went from 410 lbs to 170, but rather than celebrate her fitness ... she says people have told her to jump off a bridge over it.

We got Rosie at LAX where she reflected on her incredible weight loss. You can tell she's happy and excited about the change -- even though some of her fans do NOT feel the same way.

Check out the clip -- Rosie shared the crazy level of hate she's been getting. Seriously. You're about to see how mad people get over someone else's happiness. Translation: welcome to show biz.

Rob Kardashian and Blac Chyna have been fighting for months, partially because he's convinced she's going to leave him for a rapper.

Sources close to the parents-to-be say Rob's never been comfortable with aspects of Chyna's past. For instance, we're told he's brought up her relationships with Tyga and Future. Our source says she had to stop listening to certain songs when Rob was around because he once told her point-blank, "You'd rather date a rapper than a fat Armenian."

As we previously reported, Rob's spiraled back into depression, and has put on weight while they've been on the outs. Their convos these days are tense ... especially if Chyna suggests he work out and eat healthy. He takes it as an insult, but we're told she's concerned about his health.

Suffice to say, the days of couples workout sessions are a thing of the past.

Rob Kardashian has given up on life again, retreating to the confines of his home and gaining all his weight back ... so claim members of his family who are worried his life is now in danger.

Our Kardashian sources say ... Rob and Blac Chyna have split, and he's been living at his own home for nearly 2 months, almost never walking out his front door.

We're told Rob has gained back the 50 pounds he lost shortly after hooking up with Chyna ... again hovering around 300 lbs.

Our sources say it's become a vicious cycle. Rob has lost his motivation because of the weight gain, which has renewed fears his diabetes will spin out of control. You'll recall he was hospitalized months ago after a diabetes scare.

Rob is also MIA for his own show. Chyna -- who's 8 months pregnant -- showed up for an appearance to promote "Rob & Chyna" and he was a no-show. He didn't even stop by the baby shower that was thrown specifically for him a few days ago.

One big problem ... Chyna is the one who pulled Rob out of his depression, but now the relationship has become the big problem -- they fight whenever they're together and it just deepens the problems.

As one source put it, "Rob is slipping back into a dark place." We're told the family is praying he "snaps out of it," and they want to do whatever they can to help him.

Rob Kardashian has made an incredible turnaround in his fight against diabetes ... he's telling his family he's no longer diabetic ... TMZ has learned.

We're told Rob says he's in remission and his doctor told him he doesn't have to take medication for his type 2 diabetes.

He was hospitalized last December for his diabetes, which doctors warned could put him in a diabetic coma if he didn't maintain a healthy lifestyle.

Rob's been eating healthy and exercising regularly since he began dating Blac Chyna ... but he's not fully in the clear.

We're told doctors warned him his diabetes could come back if he falls off the wagon again.

Comedian and actor Lavell Crawford's not quite half the man he used to be, but he's getting there after dropping a buck 20 -- and his loss is a huge gain for someone else.

We got Crawford at LAX and it was immediately obvious the guy's looking much slimmer than he was in his days as extra husky bodyguard Huell on "Breaking Bad."

Lavell says his wife doesn't want him getting too skinny though, and she's got a magic number in mind. As he put it ... "She married me as a bear. You don't wanna date no bunny rabbit."

Lavell had some medical assistance to lose the weight, and he explained what else he's doing to drop the lbs. And that's all on top of his jiu-jitsu training!

Amber Heard arrived back in L.A. after getting fitted for her "Justice League" costume in London ... exactly one week after the fitting was supposedly cancelled because she was 20 lbs underweight.

TMZ broke the story ... Johnny Depp's team wanted to take Amber's deposition a week ago, but her lawyers said she was unavailable because she was going to London for the movie fitting.

We found out Amber never went, and her people said the fitting had been cancelled because she had been so stressed out she lost 20 lbs ... so the fitting was scrapped.

Our Johnny sources are scoffing ... they never believed she was supposed to be in London a week ago and that the story was concocted so she wouldn't have to be cross-examined under oath about the alleged beating.

Fact is ... she looks thin in the video.

DJ Khaled is so on his grind ... the man can't even slow down to change his clothes.

Khaled was bolting from a music video shoot in Queens with Jay Z when he momentarily went topless ... as his entourage helped him with a wardrobe change.

Khaled's been working on his fitness -- earlier this year he did a 22 day vegan diet challenge, and also went gluten-free. Tuesday morning he was logging treadmill time ... mogul-style, of course.

"The Biggest Loser" is under fire by former contestants, but a past champion says the woman blaming the show for regaining tons of weight needs to take a look in the mirror.

Ali Vincent won 'BL' season 5 -- and recently gained all her pre-show weight back.

But unlike Suzanne Mendonca and others, Ali says her weight gain was her own fault and she's working hard on her own to get it off.

As for the class action lawsuit Mendonca says she's filing ... Ali calls it "preposterous." She had other choice words for 'BL' haters.

Eddie Lacy went all Rocky Balboa (from "Rocky IV") in his off-season workout -- training in the snow TWICE A DAY with his P90X trainer Tony Horton.

Horton -- who created P90X -- spent months helping the Green Bay Packers running back trim down for the season ... and judging by the last video we shot of Lacy, it worked. Dude's pretty ripped now.

So, we asked Horton how he got Lacy back to form -- and the training regimen he revealed is pretty hardcore ... including some snow shoveling sessions in Jackson Hole.

Horton says Lacy was a natural when it came to working out -- but there was ONE exercise the guy couldn't stand.

Suzanne Mendonca says "The Biggest Loser" ruined her life, making her fat, unhealthy and flat broke ... but sources connected with the show say she's just a malcontent.

Mendonca was in NY Monday when she told our photog she's gained a ton of weight since appearing on season 2 of 'Biggest Loser.'

There are more serious allegations ... Suzanne claims the show withheld water, overexercised them and simply discarded them when the cameras stopped rolling.

Suzanne says she's in the process of corralling other contestants and filing a class action lawsuit.

Show producers tell TMZ, "We stand by the integrity of the show. The safety and well-being of our contestants is, and has always been, our #1 priority."

Bob Harper came on "TMZ Live" recently and talked about the difficulty of keeping weight off after the show.

"300" ain't just a movie to Glen "Big Baby" Davis ... it's his goal body weight to make it back to the NBA.

The ex-Celtics, Magic and Clippers player missed the 2015 season due to injury -- and put on a few LBs as a result.

But now, the 30-year-old NBA champ (2008) says he's training like a maniac and focused on shedding 30 pounds to get back to playing weight.

Rob Kardashian is now FULLY out of his shell ... he just talked to us about everything under the sun -- his wedding, his weight loss, and his biggest vice with Blac Chyna.

BlacRob just touched down at LAX -- returning from weekend appearances in NYC and Boston -- and he was a regular chatty Cathy. He addressed the story TMZ broke about producers making big money offers for them to televise their wedding.

Sounds like they're not impressed with any of the deals. Yet.

Rob also says he's dropped 40-50 lbs. so far, but he's not even counting anymore because he's too busy being happy. Just watch -- honestly, it's been years, if ever, since we've seen Rob this talkative.

He even broke some news to us about his driver license -- and let's just say Uber's gonna love him!

Rob Kardashian and Blac Chyna look like their weekly cheat day has become cheat DAYS -- they started their day by pulling through a McDonald's drive-thru for breakfast.

No word if they got any hash browns (wouldn't blame 'em) ... but we can see they got OJ. Not the worst diet slipup, but the sugar could be an issue.

In the last month they've hit up a couple of In-N-Outs and even pulled over for ice cream on the side of the road.

As they say, quitting is easy ... when you've done it a hundred times.

Rick Ross has something in common with Rob Kardashian ... they're both wasting away, but there's one major difference -- Rozay isn't cutting back on his chicken wing intake.

Sources close to Rozay tell us he's determined to lose the lbs he packed on after his arrest for assault and kidnapping -- so, he's back on his RossFit program -- which requires daily workouts.

It's working. He's already down more than 60 lbs, and the weight loss was obvious in his recent Snapchat.

Our sources say Ross used to scarf down a huge plate of food before bed, but now he's eating earlier in the evening ... and he's eating more fruits, veggies and drinking water instead of soda. The boss is still cheating though. We're told he's still gotta have wings from his Wingstop restaurants.

Somebody get Eddie Lacy some tape ... 'cause the dude is RIPPED UP!

Check out the GB Packers running back proudly displaying his guns in a tank top at LAX this weekend -- showing everyone he's been busting his ass in the gym this offseason after his coach called him out for being overweight.

We broke the story ... Lacy hooked up with the creator of P90X back in February (after the guy came on "TMZ Sports" and offered to whip Lacy into shape) ... and you can already see the results.